Question

When _______a hand, one should say “Thank you” or “It’s very kind of you.”

A．offered

B．to offer

C．to be offered

D．offering

Answer 1

A

試題分析：考查狀語(yǔ)從句的省略句：當(dāng)主從句的主語(yǔ)一致的情況，可以省略從句的主語(yǔ)和be動(dòng)詞，when offered="when" one is offered。句意：當(dāng)被提供幫助的時(shí)候，人們應(yīng)該說(shuō)“Thank you”或“It’s very kind of you.”選A。
點(diǎn)評(píng)：如果主句的主語(yǔ)和從句的主語(yǔ)一致，且狀語(yǔ)從句的謂語(yǔ)動(dòng)詞中有 be 動(dòng)詞，從句的主語(yǔ)連同be 可一起省略，該類狀語(yǔ)從句多為時(shí)間、地點(diǎn)、條件、方式或讓步等，連詞為when, while, though, if, unless, although, as if 等，后面通常接分詞、不定式、形容詞、名詞等。